Switch-throw



P. BURKLECA.

SWITCH THROW.

APPLICATION FILED AFR.22,1921.

Patented 00h M, 19L

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UNVENTOW IEW ATTO RN EY P. BURKLECA.

SWITCH THROW. APPLICATION mso APnuzz, 1921.

lwwAgfim Patented m. 11, W21,

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INVENTOP ATTORNEY PETER nnnnnncnjor LIBRARY, PENNSYLVANIA.

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Specification of Letters Patent.

Patented @ct. 11, 1921.

Application filed a rn a2, 1921. Serial no. 463,728.

To all whom. it may concern:

Be it known that T, PETER BUnKLnoA,a citizen of the United States, residing at Library, in the county of Allegheny and State of Pennsylvania, have invented new and useful Improvements in Switch-Throws, of which the following is a specification.

This invention relates to switch throws, and more particularly to a switch throw specially adapted for use in mines and similar places.

One of the main objects of the invention is to provide a switch throw of simple construction and operation which occupies but little space and may be readily positioned adjacent to the wall in a mine. A. further object is to provide a switch throw which is yieldingly locked in position. Further objects will appear from the detailed description.

In the drawings:

Figure 1 is a top plan view of a switch throw constructed in accordance with my-invention.

Fig. 2 is a front view of the switch throw.

Fig. 3 is a back view.

Fig. 1 is an underneath plan view.

An angular supporting plate 1 is secured in any suitable manner on the ends of ties A. A guide rod 2 is secured to the inner face of plate 1 in parallel spaced relation thereto, this rod forming a track for travel of a grooved wheel 3 rotatably mounted in the ,lower end of the fork 4 which straddles rod 2 and is connected at its upper end by a tension spring 5 to a finger 6 pivoted in an operating lever 7 which is pivotally secured by a bolt or pin 8 between the outer face of plate 1 and a bracket 9 secured to the plate. The lower end of this lever is reduced and rounded to form a finger 10 which passes through an elongated eye 11 provided at the outer end of outer arm 12 of an angle lever 12. An arm 12 operates between the base 1 of plate 1 and a guide and supporting member 13 secured in spaced relation to the plate, this member being of substantially lL-shape and having the inner end portion of its inner arm 13 turned upwardly and outwardly to'produce a substantially U-shaped bracket 14; which receives the angle portion of lever 12, this lever being pivotally secured in bracket 14 by a bolt 15. The inner arm 12 of lever 12 receives a clip or bridle 16 pivoted at 17 to arm 12*, thi bridle being adapted to receive a rod or other element for connecting arm 12 to a switch point in any suitable or well known manner.

When lever 7 is thrown in either direction wheel 3 is caused to move along rod 2 in the direction of movement of the lever, and spring 5 is simultaneously tensioned. After the lever has been thrown beyond center spring 5 acts to complete the throw of the lever, and also to hold the lever in adjustment. Tn the event that the switch point to which arm 12 is connected is temporarily forced open the lever 7 will be rocked slightly so as to tension spring 5 and as soon as the force acting upon the switch point is removed the lever will be returned to its original position and will act through angle lever 12 and associated parts to return the switch point to its original position.

This switch throw has been proved by actual use under working conditions in a mine to be very practical and efficient while meeting all requirements as to safety and insuring that the switch will be held in proper adjustment. In addition, this device occupies a minimum of space and is particularly well adapted for use in mines and similar places where the saving of space is an im- "portant consideration.

What I claim is 1. Tn a device of the character described, a supporting plate, an operating lever rockably mounted on said plate, a rod mounted in spaced relation to one face of the plate and extending at opposite sides ofthe pivot of the lever, a member traveling on said rod,

resilient connections between said member and the lever, a switch operating member, and operating connections between said member and the lever.

2. In a device of the character described, a supporting plate, a lever mounted on said plate, a rod secured in spaced relation to one face of the plate and extending at opposite sides of the pivot of the lever, a member traveling on said rod, a tension spring secured at its lower end to said member and at its upper end to the lever above the pivot thereof, and a member connected to said lever so as to be operated by the throw thereof.

3. In a device of the character described, a supporting plate, an operating lever pivoted on a horizontal axis on said plate, a substantially horizontally disposed rod Se cured to the plate and extending beyond the ver beyond the pivot thereof, a switch lever,

- and operating connections between the operating lever and said switch lever.

24. In a device of the character described, an operating lever pivoted on a horizontal axis, a member mounted for free horizontal movement ineither direction beyond the fulcrum of said lever and held against vertical movement, a tension spring'seoured at one end to said member and at its other end to the lever beyond the fulcrum thereof, a switch lever, and operating connections between said switch lever and the operating lever.

5. In a device of the character described, a supporting plate, a lever pivoted intermediate its ends on said plate, a rockably mounted member provided with an elongated eye, the lever being provided with an element passing through said eye, a rod secured inspaced relation to one face of the plate and extending at opposite sides of the pivot of said lever, a member traveling on said rod, and a tension spring connected at its lower end to said member and at its up- 30 per end to the lever above the pivot thereof. In testimony whereof I afiix my signature.

PETER BURKLECA. 

